A submarine sandwich, also known as a sub, hoagie, or grinder amongst many regional naming variations, is a sandwich that consists of a long roll of Italian or French bread, split lengthwise either into two pieces or opened in a "V" on one side, and filled with a variety of meats, cheeses, vegetables, seasonings, and sauces. The sandwich has no standardized name, and many U.S. regions have their own names for it; one study found 13 different names for the sandwich in the United States

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